Nuprl Lemma : es-valtype-w-valtype 0,22

i:Id, w:World, p:FairFifo, t:isnull(a(i;t))  (valtype(<i,t>) ~ valtype(i;a(i;t))) 
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Definitionstag(k), lnk(k), act(k), islocal(k), rcv(l,tg), locl(a), isrcv(k), x:AB(x), left+right, Knd, t  T, x:AB(x), P  Q, x:AB(x), s = t, kind(e), es_info(es), ecase1(e;info;i.f(i);l,e'.g(l;e')), kind(e), act(e), loc(e), act(e), kindcase(ka.f(a); l,t.g(l;t) ), kind(e), loc(e), es-V(es), tag(e), lnk(e), es-M(es), w.M, w.TA, acttype(e), w-info(w;e), rcvtype(e), isrcv(e), valtype(i;a), valtype(e), ES(the_w), Id, World, FairFifo, , isnull(a), b, A, a(i;t), kind(a)
Lemmasnot wf, assert wf, w-isnull wf, nat wf, fair-fifo wf, world wf, Id wf, w-kind wf, w-a wf, Knd wf

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